Drilling-machine.



PATBNTED APR. so, 1907. E. WESTBBRG. DRILLING MACHINE. APPLIGATION FILED JULY 7, 1906.

f a, 6 M 1 1H: Nonni: zum ca wAsmNafoN. n. c.

ERIK WESTBERG, OF

GEOFF, NORTH DAKOTA.

DRlLLlNG-IVIACHINE.

Specification of Letters Patent.

Patented April 30, 1907.

Anplicatiou filed July 7,1906. Serial No. 325,125.

To a/ZZ whom, it may concer-rt:

Be it known that I, ERIK VEsTBERG, a citizen of the United States, residing at Geoff, in the county of I/Valsh and State of North Dakota, have invented certain new and useful Improvements in Drillingallachines; and I do hereby declare the following .to be a full, clear, and eXact description of the invention, such as 'will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to new and useful improvements in drills and more particularly to that class adapted to be used in drilling metal and my object is to provide means for automatically lowering the drill while in motion.

A further object is to provide suitable means for manually operating the drill and a still further object is to provide means for elevating the drill point and parts operating the same when through drilling:

Other objects and advantages will be here inafter referred to and more particularly pointed out in the claims.

In the accomyanying drawings which are made a part of this application, Figure 1 is an elevation, partly in section, showing my improved drill ready for use, and, Fig. 2 is a sectional view as seen from line 2-2 Fig. l

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, l, indicates a shelf or platform which is adapted to be secured to any convenient p( int as to the wall of a building, by means of brackets 2.

Extending vertically through the shelf is a tubular socket 3, said socket having wings 41 thereon which fit in suitable ways 5 in the shelf and by which means said tubular socket is prevented from rotating. Disposed through the tubular socket 3 is a tubular shaft 6, sai d shaft being reduced at both ends to form shoulders 7 and S against which are adapted to rest bearing balls 9, the balls on the shoulder S being held in position by means of a collar 10 while the balls engaging the shoulders 7 are held in place by means of a flange 11 at the lower end of the tubular socket 3. A drill engaging shaft 12 is disposed through the tubular shaft 6 and ex tends beyondeach end thereof, the lower end` of the shaft having a socket therein adapted to receive a drill 13, said drill being held in the socket by means of a set screw or the like 14 while the upper end of the shaft 12 is provided with a balance wheel l5. The drill shaft 12 is longitudinally movable through the tubular shalt G and is caused to rotate therewith by means of a lug 1G integral with the tubular shalt 6 engaging a longitudinal groove 17 in the shaft l2. While the shaft 12 .is caused to rotate with the shaft G it is left free to move longitudinally therein owing to the elongation of the groove 17.

Secured to the upper end of the shaft G by means of a set screw or the like 1S is a gear 19, with which meshes a gear 20, said gear being in turn mounted upon a vertically disposed shaft 21 which is rotatably mounted in a tubular socket 22, said socket being constructed in the same manner as the tubular socket 3. A head 23 having one or more teeth 24 is secured to the lower end of the shaft 2 1, the teeth on said head being designed to intermittently engage the teeth upon a feed nut 25, said feed nut being disposed upon the threaded portion. of the drill engaging shaft l2 so that when the feed nut is rotated in one direction` the drill will be directed downwardly.

An operating shaft 27 is disposed through a tubular socket 2S and is provided at its lower end with a crank arm 2S), to which is secured one end of a pitinan 30, the opposite end of said pitman being secured to a crank pin 3l carried by the head 2B so that when the shaft 27 is operated the head 23 will be rotated. Disposed on the upper end of the shaft 27 is a lever 32 by which means motion is imparted to said shaft.

In operation the article to be drilled is disposed below the drill 13 after which motion is imparted to the operating shaft 27 through the medium of the lever 32, the crank arm 29 being so constructed that by giving the shaft 27 a substantially lu lf turn, the crank pin 31 will be disposed past the center when the lcver 32 may be returned to its initial point thereby giving the shaft 2l a complete revolution and by this construction it will be seen that by moving the lever 12 to the right and left that the continuous rotation of the shaft 2l will be accomplished without im parting complete rotation of the shaft 27. Through the medium of the gears 1Q and 2() motion will be 'imparted to the tubular shaft 6 which causes the shaft 12 carrying the drill 13 to rotate and as the gear 19 is much smaller than the gear 2() the shafts and 12 will be rapidly rotated. Vith each revolution of the head 23 the teeth thereon are di IOO IIO

\may be rotated rected into engagement with the feed nut 25 thereby checking the rapid rotation of said nut, and causing the same to be turned on the threaded portion of the sh aft 12 and directing the same downwardly from the fact that the feed nut 25 is disposed against the lower end of the tubular shaft 6 and is normally held there-against by means of a spring 33 encircling the shalt at a point between the balance wheel 15 and the upper end of the tubular shaft 6. l/Vhen the drilling has been completed the head 23 is turned until the teeth 24. are out of engagement with the teeth upon the feed nut 25 when said feed nut in the opposite direction so that the shaft 12 may be vertically raised and the drill disengaged from the work, the shaft 12 being elevated by means of the spring 33.

While I have shown the head 23 as having teeth thereon, at one point, only, it will be readily understood that any number of sets of teeth may be placed around the periphery of the head to increase the feeding capacity of the nut 25 and adapt the same for use in connection with various tempered metals.

It will now be seen that I have pro vided a drill which may be very cheaply constructed and very efficient in its operation and by providing the multiplicity of shafts and gearing it will be seen that the drill may be rapidly rotated with the employment of a small amount of manual labor.

What I claim is:

1. A drill of the class described comprising a shelf, a vertically extending tubular socket disposed through. an opening in said shelf, wings on said socket engaging ways in the shelf to prevent rotation of the socket, a ii ange at the lower end of said socket, a tubular shaft extending through said socket, the

upper and lower ends thereof being reduced to form shoulders, a collar surrounding the reduced upper end of the shaft, a grooved drill shaft longitudinally movable in said tubular shaft, a lug on said tubular shaft adapted to engage the groove in said drill shaft, whereby the drill shaft may move longitudi nally in the tubular shaft and be caused to rotate therewith and means to move said drill shaft longitudinally in said tubular shaft.

2. A drill of the class described comprising a shelf, a socket in said shelf, a tubular shaft in said socket, bearings for said shaft, a drill shaft extending through said tubular shaft and having its lower end eXteriorl y threaded, means to rotatably secure said shafts together, a gear at the upper end of said tubular shaft, a feed nut provided with teeth engaging the threaded end of said drill shaft, averi tically disposed shaft 21 parallel with said drill shaft, a socket for said vertically disposed shaft, a gear at the upper end of said vertically disposed shaft adapted to mesh with the gear at the upper end of said tubular shaft, an interrupted gear at the lower end of said intermittently engage said feed nut and check the revolution of the same whereby the drill shaft will be lowered and means to rotate said vertically disposed shaft whereby the tubular shaft and parts carried thereby will be operated.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ERIK l/VESTBERG. l/Vitnesses:

J. E. AnNoT, J. D. LARsoN.

vertically disposed shaft adapted to v 

